Sunday, January26, 2020
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Marine Weather and Tides
Elmhurst, IL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:08AMSunset 5:00PM Sunday January 26, 2020 4:17 PM CST (22:17 UTC) Moonrise 9:29AMMoonset 7:48PM Illumination 4% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ741 Expires:202001270445;;562106 Fzus53 Klot 262149 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 349 Pm Cst Sun Jan 26 2020 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Waves Are Provided As A Range Of Significant Wave Heights, Which Is The Average Of The Highest 1/3 Of The Waves, Along With The Average Height Of The Highest 10 Percent Of The Waves Which Will Occasionally Be Encountered. Lmz740>742-270445- Winthrop Harbor To Wilmette Harbor- Wilmette Harbor To Northerly Island- Northerly Island To Calumet Harbor- 349 Pm Cst Sun Jan 26 2020
Tonight..West winds 10 to 20 kt becoming northwest 10 to 15 kt. Slight chance of light freezing drizzle and snow after midnight. Waves 1 ft or less.
Monday..Northwest winds 10 to 15 kt. Slight chance of light freezing drizzle in the morning. Waves 1 ft or less building to 1 to 3 ft in the afternoon.
Monday night..Northwest winds 5 to 10 kt. Slight chance of drizzle and light freezing drizzle through the night. Waves 1 to 3 ft.
Tuesday..Northwest winds 5 to 10 kt. Mostly cloudy. Waves 1 ft or less.
LMZ741


7 Day Forecast for Marine Location Near Elmhurst, IL
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location: 41.89, -87.94     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 262021 CCA AFDLOT

Area Forecast Discussion . CORRECTED National Weather Service Chicago/Romeoville, IL 221 PM CST Sun Jan 26 2020

SHORT TERM. 208 PM CST

Through Monday night .

A small band of flurries/snow showers developed early this afternoon and is currently pushing east across southern Cook county and NW Indiana. Any lingering snow that falls will be fairly brief and no accumulation is expected.

Due to the extensive cloud cover draped across much of the local area temperatures remain in the upper 20s and low 30s. Our far southern counties managed to see some sun this afternoon where highs have risen into the mid 30s.

High-res guidance is hinting at patchy freezing drizzle and flurries potential heading into the early morning hours tomorrow associated with a subtle disturbance dropping south across the area. The best chances remain across our northeastern zones, mainly along and northeast of I-90. Not currently expecting significant impacts from this, but some patchy slick spots could develop on untreated surfaces and sidewalks. There is also an indication of some lake effect snow flurries lingering across northwest Indiana (mainly Porter county) during the day on Monday. Conditions are not overly favorable for accumulation so will maintain a mention of flurries. Highs Monday top out in the 30s again with cloudy conditions continuing with another round of patchy light freezing drizzle possible again late Monday night.

Petr

LONG TERM. 208 PM CST

Tuesday through Sunday .

Cloudy skies and light winds continue through the extended keeping temperatures fairly consistent with highs in the 30s and lows in the 20s.

Another disturbance moves across the area late Wednesday. An associated surface low is expected to remain well south of our area. A weaker wave to the north could bring an outside chance of light wintry precip as it moves across the lower Great Lakes region, but the mid-levels remain dry and models have backed off on precip chances.

Our active weather pattern continues with another system developing later this week into the weekend, but considerable model differences in timing and location of the low preclude a higher winter precip mention so will maintain slight chances at this time. Temperatures push into the upper 30s and low 40s by this weekend as upper level ridging builds across the western CONUS and above normal temps continue into the first week of February.

Petr

AVIATION. For the 18Z TAFs .

Concerns at RFD for LIFR have us thinking an amendment may be needed before very long based on upstream obs with OVC003 heading that direction. So far it has been trending steadier than other sites which saw that drop earlier so elected to keep it out at 18z issuance time. Did decide to start with IFR cigs everywhere and tempo the MVFR cigs based on GOES Snow-Fog RGB that shows the breaks filling in rapidly. Seeing LIFR later this afternoon at the Chicago metro terminals is not out of the question but confidence is even lower for those locations. One factor that seems to be correlated to LIFR cigs is colder temperatures in the 26-28F range while sites with better conditions are in the 30s and expected to stay there.

Steady but relatively light westerly flow will persist through the period. Toward the end of the TAF period Monday afternoon and evening there are signs that LIFR could become more widespread, so that will need to be addressed in later issuances.

Lenning

LOT WATCHES/WARNINGS/ADVISORIES. IL . None. IN . None. LM . None.

Visit us at weather.gov/chicago

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CNII2 18 mi18 min WSW 2.9 G 11 32°F 28°F
CHII2 - Chicago, IL 20 mi48 min W 8 G 8.9 33°F 31°F
CMTI2 - 9087044 - Calumet, IL 24 mi48 min SW 4.1 G 8.9 32°F 1011.5 hPa29°F
KNSW3 - Kenosha, WI 49 mi18 min W 9.9 G 11 32°F 1011.5 hPa (+0.0)

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chicago, Chicago-O'Hare International Airport, IL7 mi27 minWSW 69.00 miOvercast30°F27°F88%1012.5 hPa
Chicago, Chicago Midway Airport, IL12 mi25 minWSW 109.00 miOvercast30°F26°F85%1013.3 hPa
Chicago / Wheeling, Pal-Waukee Airport, IL15 mi26 minWSW 79.00 miOvercast32°F27°F82%1012.7 hPa
Chicago / West Chicago, Dupage Airport, IL17 mi3.4 hrsW 117.00 miOvercast29°F26°F89%1013.2 hPa
Lewis University Airport, IL21 mi43 minW 87.00 miOvercast29°F27°F97%1012.5 hPa

Link to 5 minute data for KORD

Wind History from ORD (wind in knots)
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Last 24hrW9W9
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1 day agoNE4CalmCalmSW4W4S4W3SW3S5SW5SW5W4W5W6W7W7W6W6W7W9W8W9W8W8
2 days agoSE6SE5SE5E3E6E3E6E5NE7NE7NE9E6E7E7E6E4E4E4E5E3CalmN3CalmN4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Chicago, IL (17,4,5,8)
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Ground Weather Radar Station Chicago, IL
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.